53221507 has 2 divisors, whose sum is σ = 53221508. Its totient is φ = 53221506.

The previous prime is 53221477. The next prime is 53221523. The reversal of 53221507 is 70512235.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53221507 - 2¹¹ = 53219459 is a prime.

It is not a weakly prime, because it can be changed into another prime (53221537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26610753 + 26610754.

It is an arithmetic number, because the mean of its divisors is an integer number (26610754).

Almost surely, 2^53221507 is an apocalyptic number.

53221507 is a deficient number, since it is larger than the sum of its proper divisors (1).

53221507 is an equidigital number, since it uses as much as digits as its factorization.

53221507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 53221507 is about 7295.3071902422. The cubic root of 53221507 is about 376.1511459448.

The spelling of 53221507 in words is "fifty-three million, two hundred twenty-one thousand, five hundred seven".